Typing error correction system

ABSTRACT

In a typing error correction system, typing error correction fluid is sprayed from an aerosol spray assembly through an aperture in a mask and onto a typing error. The mask comprises a portion of a spray discharge assembly that receives and supports the aerosol spray assembly. A discharge head mounted in the spray discharge assembly actuates the aerosol spray assembly upon movement of the aerosol spray assembly into the spray discharge assembly, and includes a normally sealed spray discharge passageway which is opened to permit discharge of the spray. A reticular foam collar mounted in the spray discharge assembly absorbs spurious spray, and a viewing port formed through the spray discharge assembly facilitates alignment of the aperture in the mask with a typing error.

United States Patent [1 1 Brown Sept. 4, 1973 TYPlNG ERROR CORRECTIONSYSTEM Prima Examiner-L10 d L. Kin 76 I t wn E.B ,4l3FllC k Y 8 l mienor a l gr 75380 fee Attorney-Richards, Harris and Hubbard Appl. No.:244,975

Related US. Application Data In a typing error correction system, typingerror correction fluid is sprayed from an aerosol spray assembly throughan aperture in a mask and onto a typing error. The mask comprises aportion of a spray discharge assembly that receives and supports theaerosol spray assembly. A discharge head mounted in the spray dischargeassembly actuates the aerosol spray assembly upon movement of theaerosol spray assembly into the spray discharge assembly, and includes anormally sealed spray discharge passageway which is opened to permitdischarge of the spray. A reticular foam collar mounted in the spraydischarge assembly absorbs spurious spray, and a viewing port formedthrough the spray discharge assembly facilitates alignment of theaperture in the mask with a typing error.

20 Claims, 1 Drawing Figure PAIENIEOSEP 41915 3.756514 l2 1 HI v 44 48INVENTOR:

WILLIAM E. BROWN ATTORNEYS TYPING ERROR CORRECTION SYSTEM This is acontinuation of application Ser. No.- S4,368, filed July 13, 1970, nowabandoned.

This invention relates to a typing error correction system, and moreparticularly to a system for spraying typing error correction fluid ontotyping errors.

At the present time, a variety of typing error correction systems are inuse. Perhaps the oldest system is the conventional eraser, whichoperates to remove the error. More recently, systems for covering typingerrors have been developed.

In accordance with one error correction system in which errors arecovered, a white film is applied to one side of a length of plastictape. The tape is positioned over a typing error and the keycorresponding to the error is struck. As the type pallet strikes thetape, the error is covered by film from the tape.

Another error correction system of the error covering type comprises asmall container of typing error correction fluid. Fluid from thecontainer is applied to typing errors by means of a small brush.Presently available systems of this type are less than whollysatisfactory because the brush does not provide adequate control overeither the amount of fluid applied or the area of application, and oftenleaves a brush streaked finish. Also, typing error correction fluidtends to thicken and it is often necessary to add a" solvent to thefluid in order to restore its original consistency.

The present invention comprises a typing error correction system inwhich typing error correction fluid-is applied in spray form. The systemincludes an aerosol spray assembly that delivers ameasured amount oftyping error correction fluid. The fluid is applied to a typ-' ing errorthrough an aperture that corresponds in size and shape to a typedcharacter. Thus,-both-the quantity of fluid applied and the areaofapplication are opti-- mized, and the correction has a superiorappearance.

Also, because the typing'error correction fluid is-stored Referring nowto the drawing, a typing error correc tion system employing the presentinvention is shown. The correction system 10 includes a spray dischargeassembly 12' and an aerosolspray assembly 14.

The aerosol spray assembly 14 includes a can 16 of the type commonlyemployed in aerosol spray containers, and a valve assembly 18.

The can 16 of the aerosol spray assembly 14 contains approximately equalquantities by weight of a typing error correction fluid and an aerosolpropellant. The typing error correction fluid preferably comprises oneof the commercially available varities. For example, a suitable typingerror correction fluid is identifiedas Federal Specification 0-C-00650and is formed by mixing 11.7 pounds titanium dioxide pigment, 23.8pounds acrylic resin of the type sold by the Rohm and I-Iass Company andidentified as ACRYLOID B-82," 4.8 pounds nitrocellulous of the type soldby the l-Iercules Company and identified as SS NITROCELLU- LOSE 1% SEC.,2 pounds plasticiser of the type sold by the Monsanto Chemical Companyand identified as SANTICIZER 140, 23.3 pounds isopropyl acetate and 23.5pounds to'luol. Similarly,- the aerosol propel- 1am preferably comprisesone of the commercially available aerosol propellants. For example, thepropellant may comprise FREON 12," a mixture of FREON 11 and FREON 12"or a mixture of FREON 12 and FREON 114, all of which are sold by E. I.duPont deNemou'rs and Co Inc. In accordance with conventional aerosolpropellant formulating practices, the propellant may further includenitrogen, butane and/or propane, if desired, The can 16 may also containone of the commercially available aerosol paints. For example, theaerosol paint manufactured by the Illinois Bronze Powder & Paint Co., ofLake Zurich, Illinois and identified as No. 150 Soft White may beemployed in the practice of the invention.

The valve assembly 18 of the aerosol spray assembly 14 is alsoconventional in design. Preferably, the valve assembly 18' comprises oneof the commercially available metering valve assemblies, and thereforedischarges a predetermined quantity of typing error correcti'o'n' fluidand propellant upon" each actuation of the aerosol spray assembly 14.For example, a metering valve assembly similar to the valve assemblysold' by the Valve Corporationof America and identified as Model B 18Fmay be employed in the aerosol spray assembly 14. When theabove-identified aerosol paint is contained' in the can 1 6, the valveassembly 18 is so constructed that approximately fifty milligrams ofaerosol paint isdischarged upon each actuation of the aerosolsprayassembly 14.

The spray discharge assembly 12 includes a cylindrical housing 20whichreceives, supports and retains the aerosol spray assembly 14. Adischarge head 22 is mountedin the housing20 adjacent the valveassemblyl8'of the'aerosol spray assembly 14. A discharge passageway 24 isformedthroughthe discharge head 22, and ext'ends-from a valve actuatingtube 26 mounted on thelower endof the valve assembly 18 to a closurenipple'28 formed at the lower'end of the'head 22. The passageway 24 mayinclude ,an expansion chamber for modifying the spray pattern of theaerosol spray assembly 14. The tube 26 comprises an actuating linkagefor thevalve assembly 18 of'the aerosol spray assembly 14 and,accordingly, whenever the assembly 14 is moved into the housing20, thetube 26-actuate's the aerosol spray assembly 14, whereupon apredetermined quantity of typing-error correction fluid and propellantis discharged through the" passageway 24".

The closure nipple 28 of the discharge head-22 is normally sealed by theclosure assembly 30. The assembly 30'includes an integral spring andclosure member 32, including a cover portion 34 that coperates with thenipple 28 to seal the passageway'24, and'a spring portion 36 .Theclosure member 32 is supported in the housing 20-by a pin 38 that isfixed-against rotation relative to the housing 20. An actuator pin isslidably supported in the housing 20 and is'retained by a collar 42. Thepin 40 is positioned in the path of the aerosol spray container 14 asthe assembly 14 is moved into the housing 20. Thus, upon actuation ofthe aerosol spray assembly 14 to discharge spray therefrom, the pin 40engages the closure member 32 and moves the cover portion 34 out ofengagement with the closure nipple 28 against the action of the springportion 36.- Because of the closure assembly 30, typing error correctionfluid does not dry within the discharge passageway 34, and thepassageway does not become clogged.

The housing of the spray discharge assembly 12 extends to a mask 44having an aperture 46 formed through it. In accordance with thepreferred embodiment of the invention, the aperture 46 is rectangular inshape and has dimensions corresponding to the maximum dimensions of atyped character. However, apertures of other shapes and having greateror lesser dimensions can be employed in the practice of the invention,if desired. The mask 44 is preferably detachably mounted on the housing20 to permit the use of apertures 46 of various configurations. Also,the mask is preferably provided with pointed projections 48 on its lowersurface to assure the production of a connection having a featherededge.

The aperture 46 is positioned to receive spray discharged through thepassageway 24 of the discharge head 22. A reticular foam liner 50 ismounted within the housing 20 to receive and retain any spurious spray.Also, a viewing port 52 is formed through the housing 20 and through thefoam liner 28 to facilitate the positioning of the aperture 46 inalignment with a typing error to be corrected.

In the use of the typing error correction system 10, the aperture 46 inthe mask 44 is aligned with a typing error to be corrected by observingthe error through the viewing port 52 and the aperture 46. When theaperture 46 is properly aligned, the aerosol spray assembly 14 isdepressed relative to the spray discharge assembly 12. As the aerosolspray assembly 14 moves into the housing 20, the pin 40 is engaged andmoved downwardly. The pin 40 engages the closure member 32 and therebymoves the cover portion 34 out of alignment with the nipple 28, againstthe action of the spring portion 36.

Upon further movement of the aerosol spray assembly 14 into the housing20, the valve actuating tube 26 of the discharge head 22 actuates thevalve assembly 18, whereupon a measured quantity of typing errorcorrection fluid and propellant is discharged from the can through thepassageway 24 and through the aperture 46 onto the typing error to becorrected. The valve 18 and the aperture 46 cooperate to deliver exactlythe right quantity of typing error correction fluid to exactly the rightlocation. Also, because the typing error correction fluid is applied asa spray, and because of the construction of the mask 44, the resultingcorrection is characterized by a smooth finish and feathered edges.

Due to the construction of the valve 18, the same quantity of typingerror correction fluid is discharged regardless of how long the aerosolspray assembly 14 is held depressed. When the assembly 14 is released,the spring portion 36 of the closure member 32 returns the cover portion34 into engagement with the closure nipple 28. The cover portion 34 andthe closure nipple 28 cooperate to seal the interior of the passageway24. This prevents typing error correction fluid from drying within thepassageway 24, and thereby prevents clogging of the passageway 24 due todry fluid.

From the foregoing, it will be understood that the present inventioncomprises a typing error correction system including an aerosol sprayassembly for discharging a predetermined quantity of typing errorcorrection fluid and a spray discharge assembly for directing fluid ontoa typing error. The use of the system is advantageous over the prior artin that it assures the application of the proper quantity of typingerror correction fluid, in that it controls the application of the fluidto a desired area, and in that it results in corrections having a smoothsurface and feathered edges. The use of the system is furtheradvantageous in that the storage of the typing error correction fluid inthe aerosol spray assembly and the sealing of the discharge passagewaywhen the system is not in use eliminate problems caused by drying andthickening of the fluid.

The present invention has been described in conjunction with thecorrection of typing errors. It will be understood, however, that theinvention is adapted to other uses. For example, errors in writtenmaterial produced other than by typing, such as by printing, xerography,lettering, etc. can be corrected by means of the present invention.Also, changes not strictly classified as errors, such as numberings,editing, address changes, and the like can be accomplished expedientlywhen the present invention is used.

Although a single embodiment of the invention has been illustrated inthe drawing and described herein, it will be understood that theinvention is not limited to the embodiment disclosed, but is capable ofrearrangment, modification and substitution of parts and elementswithout departing from the spirit of the invention.

What is claimed is:

l. A typing error correction system comprising an aerosol spray assemblycontaining correction fluid for discharging a predetermined quantity ofa spray comprising atomized correction fluid, means including a maskhaving a spray controlling aperture formed through it for directionspray from the assembly onto a predetermined area encompassing a typingerror and thereby covering the error, said mask comprising a portion ofa housing which receives the aerosol spray assembly.

2. The typing error correction system according to claim 1 furtherincluding means for actuating the aerosol spray assembly to release aspray of correction fluid therefrom and wherein the aerosol sprayassembly includes a metering valve assembly that delivers apredetermined quantity of correction fluid upon each actuation of theaerosol spray assembly.

3. The typing error correction system according to claim 1 furtherincluding means responsive to relative movement between the housing andthe aerosol spray assembly for actuating the aerosol spray assembly todischarge a spray of correction fluid.

4. The typing error correction system according to claim 1 wherein theaerosol spray assembly further includes a spray discharge passageway andfurther including means for normally sealing the spray dischargepassageway and actuator means for initially moving the sealing means outof engagement with the spray discharge passageway and for thereafterdischarging correction fluid spray through the passageway.

5. A typing error correction system comprising:

an aerosol spray assembly for discharging a spray comprising atomizedtyping error correction fluid from an outlet, and

a mask positioned a predetermined distance from the outlet andpositioned in and extending across the path of the typing errorcorrection fluid spray generated by the aerosol spray assembly andhaving an aperture formed through it so that a portion of the typingerror correction fluid spray strikes the mask and the remainder of thespray passes through the aperture onto a typing error.

6. The typing error correction system according to claim 5 furthercomprising a housing extending between the aerosol spray assembly andthe mask and including a discharge head portion for directing typingerror correction fluid spray assembly toward the mask.

7. The typing error correction system according to claim 6 wherein thedischarge head portion of the housing has a spray discharge passagewayextending through it and further including means for sealing the spraydischarge passageway except during the discharge of typing errorcorrection fluid spray therethrough.

8. The typing error correction system according to claim 7 wherein thesealing means includes a member normally positioned in sealinginterengagement with the end of the spray discharge passageway remotefrom the aerosol spray assembly and further including means responsiveto relative movement between the aerosol spray assembly and the housingfor moving the sealing member out of engagement with the end of thespray discharge passageway and for thereafter discharging a typing errorcorrection fluid spray through the spray discharge passageway.

9. The typing error correction system according to claim 6 furtherincluding a body of absorbent material mounted in the housing betweenthe discharge head portion and the mask for receiving spurious typingerror correction fluid spray.

10. The typing error correction system according to claim 6 furtherincluding a viewing port formed through the housing.

11. In a typing error correction system, a spray discharge assemblycomprising:

a relatively large mask having a relatively small aperture formedthrough it for directing a spray of typing error correction fluid onto atyping error, and

means forming a spray discharge passageway positioned in spaced relationto the mask for directing a spray of typing error correction fluid in adirection extending substantially perpendicularly to the mask so thatthespray moves into engagement with the mask and through the aperture.

12. The typing error correction system according to claim 11 furtherincluding means for normally sealing the spray discharge passageway, andfor opening the passageway to permit the discharge of a spray of typingerror correction fluid therethrough.

13. The typing error correction system according to claim 11 furtherincluding an enclosure extending be- 15. The typing error correctionsystem according to claim 13 wherein the enclosure has a viewing portformed in it to facilitate the alignment of the aperture in the maskwith a typing error.

16. A spray discharge system comprising:

an aerosol spray assembly for generating a spray comprising atomizedmaterial;

a discharge head positioned adjacent the aerosol spray assembly andhaving a spray discharge passageway formed through it for directingspray outwardly from the aerosol spray assembly;

a member normally positioned in sealing interengagement with the end ofthe spray discharge passageway remote from the aerosol spray assembly;and

means responsive to relative movement between the aerosol spray assemblyand the discharge head for moving the sealing member out of engagementwith the end of the spray discharge passageway and for thereafterdischarging spray through the spray discharge passageway.

17. A spray discharge system comprising:

an aerosol spray assembly for generating a spray comprising atomizedmaterial;

a discharge head positioned adjacent the aerosol spray assembly andhaving a spray discharge passageway formed through it for directingspray outwardly from the aerosol spray assembly;

a member normally positioned in sealing interengagement with the end ofthe spray discharge passageway remote from the aerosol spray assembly;and

actuator means for initially moving the sealing member out of engagementwith the end of the spray discharge passageway and for thereafterdischarging spray from the aerosol spray assembly through the spraydischarge passageway.

18. The spray discharge system according to claim 17 furthercharacterized by a metering valve for discharging a predeterminedquantity of atomized material from the aerosol spray assembly upon eachoperation of the actuator means.

19. The spray discharge system according to claim 18 wherein thedischarge passageway in the discharge head directs spray in apredetermined path and further including a mask positioned in andextending across the path of the spray so that a portion of the spraystrikes the mask and the remainder passes through the aperture in themask.

20. The spray discharge system according to claim 1 wherein the maskcomprises a portion of a housing which receives the aerosol sprayassembly.

UNITED STATES PATENT OFFICE CERTEIFICATE 0F CORRECTEON Patent No.3,756,514 Dated September 4 1973 Inventor(s)WILLIAM E BROWN It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby corrected as shown below:

Column 2, line 52 "coperates" should be "cooperates";

Claim 1, line 31, 'directi0n"shou1d be -directing-.

Signed and sealed this 6th day of August 1974.

(SEAL) Attest:

MCCOY M GIBSON, JR. C. MARSHALL DANN Attesting Officerv Commissioner ofPatents

1. A typing error correction system comprising an aerosol spray assemblycontaining correction fluid for discharging a predetermined quantity ofa spray comprising atomized correction fluid, means including a maskhaving a spray controlling aperture formed through it for directionspray from the assembly onto a predetermined area encompassing a typingerror and thereby covering the error, said mask comprising a portion ofa housing which receives the aerosol spray assembly.
 2. The typing errorcorrection system according to claim 1 further including means foractuating the aerosol spray assembly to release a spray of correctionfluid therefrom and wherein the aerosol spray assembly includes ametering valve assembly that delivers a predetermined quantity ofcorrection fluid upon each actuation of the aerosol spray assembly. 3.The typing error correction system according to claim 1 furtherincluding means responsive to relative movement between the housing andthe aerosol spray assembly for actuating the aerosol spray assembly todischarge a spray of correction fluid.
 4. The typing error correctionsystem according to claim 1 wherein the aerosol spray assembly furtherincludes a spray discharge passageway and further including means fornormally sealing the spray discharge passageway and actuator means forinitially moving the sealing means out of engagement with the spraydischarge passageway and for thereafter discharging correction fluidspray through the passageway.
 5. A typing error correction systemcomprising: an aerosol spray assembly for discharging a spray comprisingatomized typing error correction fluid from an outlet, and a maskpositioned a predetermined distance from the outlet and positioned inand extending across the path of the typing error correction fluid spraygenerated by the aerosol spray assembly and having an aperture formedthrough it so that a portion of the typing error correction fluid spraystrikes the mask and the remainder of the spray passes through theaperture onto a typing error.
 6. The typing error correction systemaccording to claim 5 further comprising a housing extending between theaerosol spray assembly and the mask and including a discharge headportion for directing typing error correction fluid spray assemblytoward the mask.
 7. The typing error correction system according toclaim 6 wherein the discharge head portion of the housing has a spraydischarge passageway extending through it and further including meansfor sealing the spray discharge passageway except during the dischargeof typing error correction fluid spray therethrough.
 8. The typing errorcorrection system according to claim 7 wherein the sealing meansincludes a member normally positiOned in sealing interengagement withthe end of the spray discharge passageway remote from the aerosol sprayassembly and further including means responsive to relative movementbetween the aerosol spray assembly and the housing for moving thesealing member out of engagement with the end of the spray dischargepassageway and for thereafter discharging a typing error correctionfluid spray through the spray discharge passageway.
 9. The typing errorcorrection system according to claim 6 further including a body ofabsorbent material mounted in the housing between the discharge headportion and the mask for receiving spurious typing error correctionfluid spray.
 10. The typing error correction system according to claim 6further including a viewing port formed through the housing.
 11. In atyping error correction system, a spray discharge assembly comprising: arelatively large mask having a relatively small aperture formed throughit for directing a spray of typing error correction fluid onto a typingerror, and means forming a spray discharge passageway positioned inspaced relation to the mask for directing a spray of typing errorcorrection fluid in a direction extending substantially perpendicularlyto the mask so that the spray moves into engagement with the mask andthrough the aperture.
 12. The typing error correction system accordingto claim 11 further including means for normally sealing the spraydischarge passageway, and for opening the passageway to permit thedischarge of a spray of typing error correction fluid therethrough. 13.The typing error correction system according to claim 11 furtherincluding an enclosure extending between the spray discharge passagewayand the mask.
 14. The typing error correction system according to claim13 further including means mounted within the enclosure for absorbingspurious typing error correction fluid spray.
 15. The typing errorcorrection system according to claim 13 wherein the enclosure has aviewing port formed in it to facilitate the alignment of the aperture inthe mask with a typing error.
 16. A spray discharge system comprising:an aerosol spray assembly for generating a spray comprising atomizedmaterial; a discharge head positioned adjacent the aerosol sprayassembly and having a spray discharge passageway formed through it fordirecting spray outwardly from the aerosol spray assembly; a membernormally positioned in sealing interengagement with the end of the spraydischarge passageway remote from the aerosol spray assembly; and meansresponsive to relative movement between the aerosol spray assembly andthe discharge head for moving the sealing member out of engagement withthe end of the spray discharge passageway and for thereafter dischargingspray through the spray discharge passageway.
 17. A spray dischargesystem comprising: an aerosol spray assembly for generating a spraycomprising atomized material; a discharge head positioned adjacent theaerosol spray assembly and having a spray discharge passageway formedthrough it for directing spray outwardly from the aerosol sprayassembly; a member normally positioned in sealing interengagement withthe end of the spray discharge passageway remote from the aerosol sprayassembly; and actuator means for initially moving the sealing member outof engagement with the end of the spray discharge passageway and forthereafter discharging spray from the aerosol spray assembly through thespray discharge passageway.
 18. The spray discharge system according toclaim 17 further characterized by a metering valve for discharging apredetermined quantity of atomized material from the aerosol sprayassembly upon each operation of the actuator means.
 19. The spraydischarge system according to claim 18 wherein the discharge passagewayin the discharge head directs spray in a predetermined path and furtherincluding a mask positioned in and extending across the path of thesPray so that a portion of the spray strikes the mask and the remainderpasses through the aperture in the mask.
 20. The spray discharge systemaccording to claim 19 wherein the mask comprises a portion of a housingwhich receives the aerosol spray assembly.